Journal ArticleDOI
Isotopic standards for carbon and oxygen and correction factors for mass-spectrometric analysis of carbon dioxide
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TLDR
In this paper, Niee's and Solenhofen standards were compared to the Chicago PDB standard for carbon and oxygen isotope ratios, and the correction factors for instrumental effects and for the nature of the mass spectra were derived.About:
This article is published in Geochimica et Cosmochimica Acta.The article was published on 1957-01-01. It has received 4071 citations till now. The article focuses on the topics: Carbon & Carbon dioxide.read more
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The role of depositional setting and diagenesis on the reservoir quality of Devonian sandstones from the Solimões Basin, Brazilian Amazonia
TL;DR: In this article, the authors dealt with the Upper Devonian interval, which consists of sharp-based, progradational sandstones, attributed to a storm-dominated shelf complex formed during an overall transgressive system tract, overlain by Frasnian-Famennian black shales.
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Carbon isotope records from extant Caribbean and South Pacific sponges: Evolution of δ13C in surface water DIC
Florian Böhm,Michael M. Joachimski,H. Lehnert,G. Morgenroth,W. Kretschmer,J. Vacelet,W.-Chr. Dullo +6 more
TL;DR: In this paper, stable isotope records of demosponges from the Caribbean and Coral Sea are described for the purpose of studying the influence of fossil fuel CO2 on the carbon isotopic composition of dissolved inorganic carbon (DIC) in surface water.
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Carbon isotope discrimination in alpine succulent plants supposed to be capable of crassulacean acid metabolism (CAM)
TL;DR: The δ13C value of the 8 alpine Sedum species examined in this study was much more negative than in the Sempervivum spp.
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Oxygen and carbon isotope measurements of land snail shell carbonate
TL;DR: In this paper, the δ18O values of the waters assumed to be in isotopic equilibrium with the shell carbonate were calculated and the results indicated that these ambient waters have undergone isotopic steady-state evaporation.
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Caffeine increases exogenous carbohydrate oxidation during exercise
TL;DR: Compared with glucose alone, 5 mg x kg(-1) x h (-1) of caffeine coingested with glucose increases exogenous CHO oxidation, possibly as a result of an enhanced intestinal absorption.
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Journal ArticleDOI
On the Isotopic Chemistry of Carbonates and a Paleotemperature Scale
TL;DR: In this paper, the temperature variation of the fractionation of oxygen in exchange reactions between dissolved carbonate and water and between calcite and water was calculated on theoretical grounds, and checked experimentally.
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Variation of O18 content of waters from natural sources
S Epstein,Toshiko K. Mayeda +1 more
TL;DR: A number of marine water and fresh water samples were examined for the relative O18O16 ratio, and the variation of this ratio was determined to a precision of ± 1% as mentioned in this paper.
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Revised carbonate-water isotopic temperature scale
TL;DR: The relationship between temperature and O(18) content relative to that for a Cretaceous belemnite of the Pee Dee formation previously reported (Epstein, Buchsbaum, Lowenstam, and Urey, 1951) has been re-determined using modified procedures for removing organic matter from shells, and is found to be 16.5 - 4.3 δ + 0.14 δ^2
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The geochemistry of the stable carbon isotopes
TL;DR: A survey of the variation of the ratio C13/C12 in nature can be found in this paper, where Urey and his co-workers used two complete feed systems with magnetic switching to determine small differences in isotope ratios between samples and a standard gas.